/Engine/Plugins/MovieScene/MovieRenderPipeline/Source/MovieRenderPipelineCore/Public/Graph/MovieGraphConfig.h
Find all "Overrideable" marked properties, then find their edit condition properties, then set those to false.
void InitializeFlattenedNode ( [UMovieGraphNode](API\Plugins\MovieRenderPipelineCore\Graph\UMovieGraphNode) * InNode )